NOTE: Overnight travel includes trips of at least one night or longer. Data for Canada and Mexico do not include same-day travel, which accounts for the majority of trips by U.S. residents to both of these countries.

SOURCE: U.S. Department of Commerce, International Trade Administration, Office of Tourism Industries, "U.S. Resident Travel Abroad: Historical Visitation Outbound 1990-2000 (One or More Nights)," available at http://tinet.ita.doc.gov, as of July 18, 2001.